class_docstr: The Latent Context Embedding Additive (LCE-A) Kernel.
  
  This kernel is similar to the SACKernel, and is used when context breakdowns are
  unbserverable. It assumes the same additive structure and a spatial kernel shared
  across contexts. Rather than assuming independence, LCEAKernel models the
  correlation in the latent functions for each context through learning context
  embeddings.
code: def train(self, mode: bool = True) -> None:
      super().train(mode=mode)
      if not mode:
          self.register_buffer(
              "_context_covar", self._eval_context_covar()
          )
  
imports: from typing import Any, Dict, List, Optional
  import torch
  from gpytorch.constraints import Positive
  from gpytorch.kernels.kernel import Kernel
  from gpytorch.kernels.matern_kernel import MaternKernel
  from gpytorch.priors.torch_priors import GammaPrior
  from linear_operator.operators import DiagLinearOperator
  from linear_operator.operators.dense_linear_operator import DenseLinearOperator
  from torch import Tensor
  from torch.nn import ModuleList
label_desc: Use image node_id 11 for calling the LCEAKernel obj's underlying member method code with example usage: obj.train(mode) without return types